Patents by Inventor Elda Moizo

Elda Moizo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photographic fixer composition and method
    Patent number: 5629138
    Abstract: The present invention provides a fixer composition and a method of processing an exposed photographic silver halide element comprising the steps of developing by means of a developer comprising a silver halide developing agent and treating the developed element with a fixer composition, wherein the fixer composition comprises a silver halide solvent, a sulfite ion source, an aluminum salt hardening agent, a buffering agent, a sequestering agent and an .alpha.-ketocarboxylic acid compound in an amount of more than 2 grams per liter corresponding to the formula:R--CO--COOHwherein R represents a hydrogen atom or an organic group.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: May 13, 1997
    Assignee: Imation Corp
    Inventors: Filippo Faranda, Elda Moizo, Carlo Marchesano
  • Photographic silver halide developer composition and process for forming photographic silver images
    Patent number: 5578434
    Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 26, 1996
    Assignee: Imation Corp.
    Inventors: Elda Moizo, Carlo Marchesano, Andrew Mott, Dian E. Stevenson
  • Photographic silver halide developer compositions and process for forming photographic silver images
    Patent number: 5545508
    Abstract: A process for forming a black-and-white high contrast negative photographic silver image by development of a silver halide photographic element with an aqueous alkaline photographic developer composition comprising a dihydroxybenzene developing agent, an auxiliary superadditive developing agent, an antifogging agent, an antioxidant compound, a combination of buffering agents and a sequestering agent, characterized by the fact that: a) the auxiliary developing agent is an aminophenol compound, b) the combination of buffering agents comprises at least a first buffering agent represented by carbonate compounds and at least a second buffering agent represented by phosphate compounds, the total amount of said first buffering agent and said second buffering agent being at least 35 grams per liter, band c) the pH of said aqueous alkaline photographic developer composition is in the range 9.0 to 11.0.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: August 13, 1996
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Carlo Marchesano, Elda Moizo, Filippo Faranda